Caching of folder sizes

[DayCuts]

Sort of on the same subject... i think it would be nice if folder sizes were included in the selected files information (ie. when you select a bunch of folders it would show the combined size)... atm this only works with files.

I'm not entirely sure if there is any standard to the format in which folder sizes are reported amung the ftpd's that do support it (mostly nix/bsd), but for the most part its always in bytes so it would be nice to include it in the calculation when relevent.